create config file for centered layout

This commit creates a config.h file for a nice default centered
dmenu. In addition to enabling the centered setting, it configures a
vertical list using a grid configuration. It also configures
XResources to use the color naming scheme I use in other applications
and removes settings that I won't ever want XResources to touch.

config.h

@@ -0,0 +1,58 @@
+/* See LICENSE file for copyright and license details. */
+/* Default settings; can be overriden by command line. */
+
+static int topbar = 1;                     /* -b  option; if 0, dmenu appears at bottom     */
+static int centered = 1;                   /* -c option; centers dmenu on screen */
+static int min_width = 500;                /* -cw option; minimum width when centered */
+static int fuzzy = 1;                      /* -F  option; if 0, dmenu doesn't use fuzzy matching     */
+
+/* -fn option overrides fonts[0]; default X11 font or font set */
+static char font[] = "monospace:size=10";
+static const char *fonts[] = {
+	font,
+	"monospace:size=10",
+};
+
+static char *prompt      = NULL;      /* -p  option; prompt to the left of input field */
+
+static char normfgcolor[] = "#bbbbbb";
+static char normbgcolor[] = "#222222";
+static char normhlcolor[] = "#ffc978";
+static char selfgcolor[]  = "#eeeeee";
+static char selbgcolor[]  = "#005577";
+static char selhlcolor[]  = "#ffc978";
+static char *colors[SchemeLast][2] = {
+	/*     fg         bg       */
+	[SchemeNorm] = { normfgcolor, normbgcolor },
+	[SchemeNormHighlight] = { normhlcolor, normbgcolor },
+	[SchemeSel]  = { selfgcolor,  selbgcolor  },
+	[SchemeSelHighlight] = { normhlcolor, selbgcolor },
+	[SchemeOut]  = { "#000000",   "#00ffff" },
+};
+/* -l and -g options; controls number of lines and columns in grid if > 0 */
+static unsigned int lines      = 8;
+static unsigned int columns    = 1;
+
+/*
+ * Characters not considered part of a word while deleting words
+ * for example: " /?\"&[]"
+ */
+static const char worddelimiters[] = " ";
+
+/* Size of the window border */
+static unsigned int borderpx = 0;
+
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+	{ "font",            STRING, &font },
+	{ "foreground",      STRING, &normfgcolor },
+	{ "background",      STRING, &normbgcolor },
+	{ "highlightColor",  STRING, &normhlcolor },
+	{ "foreground",      STRING, &selfgcolor },
+	{ "accentColor",     STRING, &selbgcolor },
+	{ "highlightColor",  STRING, &selhlcolor },
+	{ "min_width",       INTEGER, &min_width },
+	{ "borderpx",        INTEGER, &borderpx },
+};